Web Forms :: Master Page Does Not Recognize "dropped" Controls From Toolbox
Dec 2, 2010
I am Desgining a website with asp.net and I have a problem with one of my master pages: I cannot add a control and then use it in the code behind becase the compiler sends me a " null exception". When I try to debug the reason, Before the exception it says the control has a null value. This makes it extremely hard for me, as I have to use the "<%= %>" instead of asp.net controls. This happens wheter I write the conrol my self in mark up, or drag the control from the toolbox. Here is the exception from the compiler:
Editing a web site project with master page in VS2010Ultimate with SP1 and Win7Ultimate 64 bit. Former everything was working fine - all toolbox windows were available when editing master page or aspx page. Now with the master page all toolbox relevant tab were enabled and show - when switching to a aspx page only the HTML tab is shown and enabled. When checking all "Show all" all expected tabs are disabled.
Even the <asp:> namespace is a unrecognized namespace in the aspx file.
When compiling or debugging/running everything is ok.
How can I solve this problem? I'm using Win7 Ultimate 64 Bit, VS2010 Ultimate and IExplorer 9 and the latest updates from Microsoft.
My site was working fine in Visual Studio 2008, but the code-behind pages have suddenly stopped recognising new controls which I add to the main page. For example I added a label with id 'lblEventHeader' to the main page and then tried to set a text property in the Page_Load event. I get a compile error of "the name 'lblEventHeader' does not exist in tne current context. Existing controls, which I added before this problem seems to be unaffected.
As far as I am aware, I have not done anything which should cause this. I have even reinstalled Visual Studio, but I still get the same error message. Have I inadvertently deleted or corrupted a reference file. I have checked the Codefile and Inherits properties of the page.
According to the above article you "Unblock" the zip file and then unzip it. You then create a new tab within the toolbox window and add the dll to show and use the toolbox items. However when I do that I'm getting the following:
I have an "Edit" page that uses a FormView bound to an EntityDataSource. The page is called with the ID field of the record to edit in the query string: "EditEmployee.aspx?ID=10". The EDS the FormView is bound to is using: AutoGenerateWhereClause=true and a QueryStringParameter. Below the FormView I have a ListView that contains some child records of the FormView. The ListView is bound to a seperate EDS and also uses the (same) QueryStringParameter.
The problem I am having is when this ListView attempts to Insert or Edt a column I receive an error because I don't have the ID field (EmployeeID) of the parent bound anywhere in the ListView (and obviously, it is setup as a ForeignKey so it fails, like it should). Any advice on the best way to get this ID (EmployeeID) column bound in the ListView? There are many things I can do in code behind, but I would like to solve this in the markup if possible. I can move the ListView so that it is inside of the FormView if necessary.
I have a master page setup that is used throughout my site that is basically a header with a menu. I recently added a textbox and a button to this master page which is to be a quick search box that is available anywhere in the site. When a user enters text into the search box and hits the button, I need to load the actual content page which is used to search and show search results (which also uses this same master page), and have the text entered available so the search can be triggered automatically. Again, this search text box and button is now in my master page so it could be triggered from anywhere in the app... it serves as a convenient way to do a basic search from anywhere in my app, without having to first navigate to the actual 'search page' that already exists. You can also navigate to the actual search page, which uses the same master page, where there is many more search options.I'm thrown off by the master page arrangement, which I have not used until this project. What do I do?
I am using the below code to rotate the drag/dropped image.The rotation is working fine,but when i start rotating ,the image moves outside the "div" container .Anything i am missing.
//Moving outside the container for first time.After dragging inside the div,then rotates inside the div
i have a masterpage and has some linkbuttons in it, i also have a webform which is a content page for the masterpage. i like to access the controls to the webform via the linkbutton residing in the masterpage or access the linkbuttons via the webform controls.
I have a master page with a textbox that I want to use for a search, and display the results on the content page.
I've dragged in the datasource to the content page, and configured the formview to use that datasource... almost.
The issue I'm having is that on the last step of the configure datasource wizard where you select the parameters, I want to select the master page textbox control for the search parameter... but of course it's not available in the list. The list only allows me to choose controls from the content page.
How do I set this master page search box as the parameter for my datasource?
Even my button click event handler gives me the following error:
Error 2 Handles clause requires a WithEvents variable defined in the containing type or one of its base types. E:NoteTenderNoteTenderMembersManageNote.aspx.vb 27 91 NoteTender
I have verified that my inherits is using the correct namespace and class name.
I'm trying to dynamically change the look of my main master page depending on what nested master page that the current content page is using .
So for example.
Main master page = main.master My nested page = nested.master (uses main.master) content page = content.aspx (uses nested.master)
So in the Page_Load event of main.master I want to add a switch statement that will check to see what nested master page is currently being used by content.aspx, or whatever content page is loaded.
So far I have got
protected void Page_Load(object sender, EventArgs e) { string nMaster = //This is the line of code that I am looking for. switch(master) { case "nested.master": //all my logic here. break; } }
it is very easy to access master page control from content page like
[code]....
but how could i access controls of content page from master page. suppose a textbox there in content page and one button is there in master page. i want that when i will click on master page button then i want to show the text of textbox in the content page in the label of master page. how to achieve it.
I have a master page containing a tree and 3 dropdown lists. I am populating a context menu on right click of each node, and when clicked on any item of the context menu, it navigates to required pages.
My problem is after navigating to the required page, the selected values from the drop down lists and the selected node from the tree are getting cleared.
I can set the selected values for the dropdown lists by making some properties in master page. But how do i maintain the selected node?
In my content page, i have got the valuepath of the right clicked node.
Or is there any other way than setting the properties in master page?
I got a Master page and nested master pages in the subfolders.
Top Level Master page
Second Level Master page inherited Top Level Master page
Third Level Master page inherited Second Level Master page
However, changes (i.e. new images & alt. name) that I made in the Top level master page did not apply to the second or third levels.My webpage has a correct front page but not in the sections. How can i correct this ?
I am working on masterPage/sub masterpages, all worked fine until this morning.When I open a .aspx which uses masterpages, in the design view it shows the error message..
I've checked both master pages several times, all tags are matched and visual stuido itself doesn't indicate any errors. Also in debug mode the html page is generated without any problems..
My computer system froze on me, the mouse froze, cntrl-alt-del, did nothing, so I reset it. Did a disk check, and now everything seems fine except for my master Page html code which I was in the middle of editing when it happened. The VB code-behind file is still ok, the designer file still shows ok with all of the controls in it, but I can't get into desgn or source view. It just opens and gives a whole page of hesixecimal code such as as:
I have a question about master page.After i pushed button i would like to change my master page to another master page for that page, is that possible?
i ve developed a website, in tht i ve placed a master page and the menu master page as nested one. in the menu master page, i ve placed the menus. i would lik to show particular menu items for the authorized user. so for tht, how to use the menu controls which is in the menu master, in other pages lik login or other pages.
Is it possible to inherit a sharepoint master page(as a parent) in another application's master page which will be treated as child (i.e. after integrating that standalone application with the sharepoint application)? I am totally new to Sharepoint..
